In Situ XPS Studies of Perovskite Oxide Surfaces under Electrochemical Polarization†

2005 ◽  
Vol 109 (6) ◽  
pp. 2445-2454 ◽  
Author(s):  
Greg Vovk ◽  
Xiaohua Chen ◽  
Charles A. Mims
Keyword(s):  
Perovskite Oxide ◽  
Oxide Surfaces ◽  
Electrochemical Polarization ◽  
In Situ Xps

scholarly journals The Environmental Photochemistry of Oxide Surfaces and the Nature of Frozen Salt Solutions: A New in Situ XPS Approach

2016 ◽  
Vol 59 (5-7) ◽  
pp. 591-604 ◽  
Author(s):  
Fabrizio Orlando ◽  
Astrid Waldner ◽  
Thorsten Bartels-Rausch ◽  
Mario Birrer ◽  
Shunsuke Kato ◽  
...  
Keyword(s):  
Oxide Surfaces ◽  
Salt Solutions ◽  
In Situ Xps ◽  
Environmental Photochemistry

In Situ Exsolved Au Nanoparticles from Perovskite Oxide for Efficient Epoxidation of Styrene

2021 ◽  
Author(s):  
Yang Gao ◽  
Xing Chen ◽  
Shuqi Hu ◽  
Shiguo Zhang
Keyword(s):  
Density Functional Theory ◽  
Thermodynamic Analysis ◽  
Density Functional ◽  
Au Nanoparticles ◽  
Oxide Catalyst ◽  
Density Functional Theory Calculations ◽  
Average Diameter ◽  
Perovskite Oxide ◽  
Functional Theory

Au-doped SrTiO3 perovskite oxide catalyst (Sr0.995Au0.005TiO3-δ) has been designed and synthesized based on thermodynamic analysis and density functional theory calculations. During reduction, Au nanoparticles with an average diameter of 2...

scholarly journals In-Situ XPS Monitoring and Characterization of Electrochemically Prepared Au Nanoparticles in an Ionic Liquid

ACS Omega ◽  
2017 ◽  
Vol 2 (2) ◽  
pp. 478-486 ◽  
Author(s):  
Merve T. Camci ◽  
Burak Ulgut ◽  
Coskun Kocabas ◽  
Sefik Suzer
Keyword(s):  
Ionic Liquid ◽  
Au Nanoparticles ◽  
In Situ Xps

scholarly journals Reactivity of mesoporous carbon against water – An in-situ XPS study

Carbon ◽  
2014 ◽  
Vol 77 ◽  
pp. 175-183 ◽  
Author(s):  
Sylvia Reiche ◽  
Raoul Blume ◽  
Xiao Chen Zhao ◽  
Dangsheng Su ◽  
Edward Kunkes ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
In Situ Xps ◽  
Xps Study

In-situ XPS study of ALD ZnO passivation of p-In0.53Ga0.47As

2015 ◽  
Vol 11 (5) ◽  
pp. 769-774 ◽  
Author(s):  
Antonio T. Lucero ◽  
Young-Chul Byun ◽  
Xiaoye Qin ◽  
Lanxia Cheng ◽  
Hyoungsub Kim ◽  
...  
Keyword(s):  
In Situ Xps ◽  
Xps Study

scholarly journals Understanding the Impact of Hydrogen Activation by SrCe0.8Zr0.2O3−δ Perovskite Membrane Material on Direct Non-Oxidative Methane Conversion

2022 ◽  
Vol 9 ◽  
Author(s):  
Sichao Cheng ◽  
Su Cheun Oh ◽  
Mann Sakbodin ◽  
Limei Qiu ◽  
Yuxia Diao ◽  
...  
Keyword(s):  
Methane Conversion ◽  
Membrane Reactor ◽  
Membrane Reactors ◽  
Fixed Bed Reactor ◽  
Perovskite Oxide ◽  
Oxide Material ◽  
Hydrogen Activation ◽  
Permeable Membrane ◽  
The Impact

Direct non-oxidative methane conversion (DNMC) converts methane (CH4) in one step to olefin and aromatic hydrocarbons and hydrogen (H2) co-product. Membrane reactors comprising methane activation catalysts and H2-permeable membranes can enhance methane conversion by in situ H2 removal via Le Chatelier's principle. Rigorous description of H2 kinetic effects on both membrane and catalyst materials in the membrane reactor, however, has been rarely studied. In this work, we report the impact of hydrogen activation by hydrogen-permeable SrCe0.8Zr0.2O3−δ (SCZO) perovskite oxide material on DNMC over an iron/silica catalyst. The SCZO oxide has mixed ionic and electronic conductivity and is capable of H2 activation into protons and electrons for H2 permeation. In the fixed-bed reactor packed with a mixture of SCZO oxide and iron/silica catalyst, stable and high methane conversion and low coke selectivity in DNMC was achieved by co-feeding of H2 in methane stream. The characterizations show that SCZO activates H2 to favor “soft coke” formation on the catalyst. The SCZO could absorb H2in situ to lower its local concentration to mitigate the reverse reaction of DNMC in the tested conditions. The co-existence of H2 co-feed, SCZO oxide, and DNMC catalyst in the present study mimics the conditions of DNMC in the H2-permeable SCZO membrane reactor. The findings in this work offer the mechanistic understanding of and guidance for the design of H2-permeable membrane reactors for DNMC and other alkane dehydrogenation reactions.

scholarly journals Chemically addressed switching measurements in graphene electrode memristive devices using in situ XPS

2019 ◽  
Vol 213 ◽  
pp. 231-244 ◽  
Author(s):  
Itır Köymen ◽  
Pınar Aydoğan Göktürk ◽  
Coşkun Kocabaş ◽  
Şefik Süzer
Keyword(s):  
Graphene Electrode ◽  
In Situ Xps ◽  
Graphene Structures

In situ measurements using XPS were performed on Pt/TiO2/TiOx/graphene structures to chemically address switching and hysteresis.

Plasma modification of vanadium oxynitride surfaces: Characterization by in situ XPS experiments and DFT calculations

2020 ◽  
Vol 153 (14) ◽  
pp. 144709
Author(s):  
A. Osonkie ◽  
V. Lee ◽  
P. Chukwunenye ◽  
T. Cundari ◽  
J. Kelber
Keyword(s):  
Dft Calculations ◽  
Plasma Modification ◽  
In Situ Xps

Elucidating the mechanism of the CO2 methanation reaction over Ni–Fe hydrotalcite-derived catalysts via surface-sensitive in situ XPS and NEXAFS

2020 ◽  
Vol 22 (34) ◽  
pp. 18788-18797 ◽  
Author(s):  
Gianfranco Giorgianni ◽  
Chalachew Mebrahtu ◽  
Manfred Erwin Schuster ◽  
Alexander Ian Large ◽  
Georg Held ◽  
...  
Keyword(s):  
Co2 Methanation ◽  
Promotion Effect ◽  
Methanation Reaction ◽  
In Situ Xps

In situ surface sensitive XPS and NEXAFS clarify the promotion effect of Fe in Ni–Fe/hydrotalcite-derived catalysts for the CO2 methanation reaction.

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